ElasticSearch: update clear() for 1.x+ syntax
ElasticSearch: update clear() for 1.x+ syntax

As per http://www.elasticsearch.org/guide/en/elasticsearch/reference/1.x/docs-delete-by-query.html this should be nested inside a
top-level query block:

{“query”: {“query_string”: …}}

speedplane/django-haystack,speedplane/django-haystack,speedplane/django-haystack